Safety helmet



FIG. 1 is a top plan view of a safety helmet showing our new design;

FIG. 2 is a left side elevation view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a perspective view thereof; and,

FIG. 6 is a rear elevation view thereof. 

CLAIM We claim the ornamental design for a safety helmet, as shown and described. 